• Journal of the Korean association of regional geographers
• /
• v.9 no.4
• /
• pp.534-545
• /
• 2003

The main purpose of this paper is to describe the granitic regolith and frost creep phenomena in Daegwanryung area in order to demonstrate the relationship of the weathered materials and the surrounding surface, in order to point out that the characteristics of this particular complex of granitic regolith most closely resemble those of soil frost creep phenomena formed elsewhere under periglacial conditions. For this study, the writer has clarified their structure and its associated milieux, with a group of methods and techniques, field survey, micro-morphological analysis, granulometry of weathered materials etc. Such facies of granitic regolith in situ with silty heterometric materials and micas are prone to be deformed by cryo-suction as well as deep freezing. It was probably formed by cryogenic activity, or frost creep in the periglacial climate of a very cold and humid condition.

• Journal of The Geomorphological Association of Korea
• /
• v.27 no.3
• /
• pp.1-11
• /
• 2020

A CIA analysis (A-CN-K and A-CNK-FM ternary diagram) indicates that, unlike the general granitic hills of the Korean Peninsula, the chemical weathering of the granitic grus (sandy regolith) in the eastern Jincheon basin is variable in geomorphic site except the Chuncheon basin. In the study area, there are three types of hills, such as; inner hills, linear isolated hills, and outer hills. The weathered mantles of the outer hills and linear isolated hills are weakly altered, whereas the inner hill, the Bonghyeon profile, shows a stronger chemical loss of the compositions approximating saprolite. There are small differences between the outer hills and linear isolated hills. The Geumwang site is considered fresh rock due to a low lever of alteration, although its sampling profile shows sandy weathering mantles. In the profiles of the Masan and Mugeuks sites, the lower part of weathering mantles has not experienced a significant level of component loss, but the upper regoliths have substantially been modified. The alteration of the hills occurs by chemical loss of CaO and Na₂O. K₂O exhibited little variation at all sampling suites and it has not changed into saprolite.